Oscillator



Jan. 2. 1945. D. p. KALLENBACH 2,366,266

OSCILLATOR Filed Jan. '11, 1944 5 sheets-Sheet 1 l u veutar ,w zoid'lfizz/9226005 M Jam 2; 1945. I D. D.,KALLENBACH 2,366,266

OS C ILLATOR Filed Jan. 11, 1944 5 Sheets-Sheet 2 7022a flziziienaaiJan; 2. 1945. D. D. KALLENBACH- 2,366,266

OSCILLATOR Filed Jan. 11, 1944 3 Sheets-Sheet 3 Inventor maticelevational views showing various posi- Patented Jan. 2, 1945 Donald D.Kallenbach, Cheyenne, wyo qassignor to Ideal Laboratory Tool & Supply.00., Cheyenne, Wyo., a partnership composed of R. M. Tinus and DonaldD. Kallenbach Application January 11,1944, Serial No. 517,843

4 Claims.

This invention relates to improvements in oscillators or mechanism forconverting rotary 1110- tion into reciprocating motion parallel to anaxis of rotation.

While the invention has been primarily de- 'signed as a bench machinefor subjecting gyroscopic aircraft instruments to a simulated airtionsof the table as the trunnion head rotates in clockwise direction, and

Figure 9 is a fragmentary sectional view illustrating the universalconnection between the drag link and the table. 3 f Referring in detailto the drawings, wherein I a have shown by way of example a machineemcraft motion and enable a mechanic to properit is to .be understoodthat the invention is capable of other practical applications, such asuse in the construction of fvariable displacement pumps, multi-contactflashing switches, and the like.

Theprimary object of the present invention is to provide a mechanism ofthe above kind em -bodying a trunnion block adjustment which provides acenter of gyration well above a table forming part of the mechanism andupon which the instruments are to be placed, thereby avoiding lateralacceleration to theinstruments on test. In other words, a center ofgyration is provided which approaches the center of gravity of theinstrument being tested, in which case the lateral accelerations arenegligible. ,This makes it possible to balance and adjust theinstruments inorder that theywill not drift excessively when in flightservice.

. 1y balance, adjust and calibrate said instruments,

bodyin g the present invention and particularly designed for use to aidin the calibration of gy l0 roscopicaircraft instruments, 5 indicates astationary base having a hollow raised portion 6,

from which rises a tubular standard I and one side of which is cut away,as at 8. Secured upon the base 5 at the cut-laway side of raised portion6 andclose beside the standard 1 is a motor 9 having a depending driveshaft [0 on the lower end of wliichis secured a pinion ll. Journaled inthe base 5 and standard] is a vertical stout shaft l2 on which is fixeda large gear [3 positioned in'the hollow raised portion 6 and meshingwith the pinion ll. Fixed on the projecting Other important objects. ofthe invention are 7 to provide a mechanism or machine of theabovekindwhich is of exceptional compactness and low overall height so as to makeit ideal for bench use, which is very rugged to insure long andtrouble-free service, and which is comparatively easy to adjust.

The present invention consists hereinafter more fully described, ,shownin the accompanying drawings and claimed.

In 'the drawings, wherein like reference characters indicatecorresponding parts throughout theseveral views: l l

Figure 1 is a front elevational view of an oscillator constructed inaccordance with the pres- I ent invention.

Figure 2 is a substantially central vertical sectional view thereoftakenon the plane of line 2-4 of Figure 4.

\ Figure 3 is a similarview taken on the plane of the line 3-3 of Figure4. i

Figure 4 is a horizontal section takenon line 4-4 of Figure 1.,

Figures 5 to 8, inclusive, are small diagramin the novel form,combination and arrangement of parts upper end of shaft I2 is asegmental trunnion block l4 provided on opposite sides with downwardlycurved arcuate ribs l5 having a radius whose center is well above theblock [4 and the parts carried thereby. The shaft l2 mayhavea reducedthreaded upper end tightly screwedinto the trunnion block M, as shown atI6.; Also, the trunnion block l4 preferably rotatably fits over thereduced upper end of standard I, as at IT.

The presentdevice further includes a trunnion head composed of a plate[8 fromwhich depend rigid trunnionplatesl9 that are spaced apart tosnugly receive and flatly engage opposite flat sides of trunnion blockM, the plates I9 having arcuate grooves in the inner faces thereof, asat 20, corresponding to and slidably, receiving the ribs [5; of trunnionblock I4. Trunnion head plate II?) has a central upstanding shorttrunnion 2! .40

top23. l a

It will be seen that the trunnion head is mountrotatably fittedin acentral opening 22 0f table ed on the trunnion block for tiltingadjustment relative thereto about a, horizontal axis located well abovethe table top 23. Means are provided for tiltably adjusting and securingthe tilted adjustment of the trunnion head relative to the trunnionblock, the adjusting means embodying a cross member 24 connecting thetrunnion plates 19 behind the block M where the latter has a fiatvertical face 25, and a set screw 25 threaded throughthe cross member 24and bearing against the face 25'; of block l4. When the screw 25 isfully retracted, the trunnion head may be. fully tilted, and this tiltmay be lessened by threading restrained from rotation by drag link 3|.

, nion block l4 and threaded into the opposite trunnion head plate I9.By tightening screw 28, the plates l9 may be brought into tightfrictional engagement with opposite sides of trunnion block M for thepurpose mentioned. The arcuate slot is of course concentric with grooves20, and the portion 29 of the securing screw is movablein .this' slotwith the trunnion head.

A drag link 3! connects the table 23 with a stationary part such asthetop of motor 9, for re straining said table against rotation with thetrunnion head. As shown clearly in Figure 9, there is a universalconnection 32 between each end of drag link 3| and the parts 9 or 23 towhich it is attached. As these universal connections are similar,description and illustration of one will suffice for both. Eachconnection includes a hollow member rigid with the end of link 3| andhaving a slot in the top side thereof, as at 33, to permit the passageof a ball member 34 rigid with and projecting from the associated member9 or 23. The ball member 34 is engaged at one side by means if thesocketed inner end of a screw plug 35 threaded into the outer end'oftubular or hollow, member 32, and the opposite side of ball member .36which engages ball member 34 has a shallow socket to fit the side ofball member 34. It will thus be seen that an efiicient universalconnection is provided.

In operation, the motor 9 rotates the shaft l2 through the gearing ll,I3, and trunnion block I4 and trunnion head plate l8 with its attachedparts are caused to rotate with shaft l2, trunnion 2| turning freely inopening 22 of table 23, which is When the top plate or table 23 is setto zero position, its plane is perpendicular to the axis of rotation,and there is no motion of the table as the head plate 18 revolves. Toset the machine for operation, the

- plane of plate member I8 is placed at a desired angle to the axis ofrotation through the trunnion block adjustment by adjusting the screw25,

within the spirit andjscope of the .invention as claimed.

What I claim as new is:

1. An oscillator comprising a wobbling member, a rotary shaft, 2. blockcarried by said shaft in axial alignment therewith and turning with theshaft, 2. trunnion head member carried by said block and carrying saidwobbling member and rotatable relative to the latter, means mounting thetrunnion head member on the trunnion block for tilting adjustmentdiametrically of the shaft to a position at a desired angle to the axisof rotation of the shaft and the block and about an axis removed fromthe side of the wobbling member opposite that at which the trunnion headmember is disposed, means to tiltably adjust said trunnion head memberand secure the same in an adjusted position, means for rotatably drivingsaid shaft, and means for restraining said wob- 'bling member againstrotation and permitting wobbling thereof.

2. .An oscillator-comprising .a wobbling member, a rotary shaft, a blockcarried by said-shaft co axially therewith and turning with the .shaft,.a trunnion head member carrying said wobbling member and rotatablerelative to the .latter,

- means mounting the trunnion head member .on

' from the side .of the wobbling member opposite ametrically of theshaft and relative .to the block and when the head revolves this angleis imposed on the table 23 at all points during each revolution of thehead. Since the table is held against turning with the head plate by thedrag link, the latter induces tilting of the table as the corner of thelatter to which the drag link is attached, rises and falls. Thus, anyinstrument resting on table 23 is subjected to a wobbling motion withoutsubjecting. the implement to undesirable lateral accelerations thatwould change its drift characterin details are contemplated such asfairly fall that at which the trunnion head member is disposed, meanscarried by the head member totiltably adjust said trunnion head member[and hold the same in an adj usted-position, means for rotatably drivingsaid shaft :and said trunnion block, and means for restraining saidwobblingmember against rotation and permitting wobbling thereof, saidrestraining means comprising a drag [link having universal jointconnections at its ends for connecting one end of :said drag link with$8.

stationary member and the other end of the drag link with the wobblingmember.

3. .An osciilating'tazbie comprising a :base having ;a tubular standardrising therefrom, va motor mounted on the base beside thestandard, avertical shaft journaled vertically through-said standardand operativelygeared to :said motor, a trunnion block fixed on the upper end of saidshaft in axial alignment therewith and turning with the shaft, atrunnion head member mounted on the trunnion block for. tiltingadjustment di to an adjusted position at a desired angle relative to theaxis .of rotation of said shaft and about an axis .situated well abovethe trunnion head member, .a table top resting .on said ltrnnnion headmember, said trunnion head member having a trunnion rotatable through anopening formed in the table top, means restraining said table topagainst rotation with the head member while permitting wobbling thereof,and means to tiltably adjust the trunnion head member relative to thetrunnion block and holding the same in an adjusted position.

4. An oscillating table comprising a base having a raised hollow portioncutaway at one side, an upwardly extending hollow standard carried bythe said hollow portion, a vertical shaft journaled through saidstandard, "a gear fixed on the lower portion of said shaft within thehollow raised portion of the base, a motor mounted on the base ci ose toone side .of the hollow standard, said motor having a depending driveshaft carry ing a pinion meshing with said gear, a trunnion blockcarried by the upper end of said shaft in axial alignment therewith, atrunnionhead member mounted on said trunnion block for tiltingadjustment diametrically of the shaft to positions at a desired anglerelative to the axis of said shaft and about an axis well above saidtrunnion head member, said head having side plates engaging oppositeside faces of the block and formed with ar cuate slots, a screw carried10 by said block and passing through the slots to guide and limittilting of the head, means carried by the side plates to engage theblock and to tiltably adjust said trunnion head member, a table topresting on said trunnion head member,

, said trunnion head member being rotatable relative to the table top,and means to restrain the table top against rotation with the headmember while permitting wobbling thereof.

DONALD D. KALLENBACH.

